#!/bin/bash
#
# pring this year or next year by system time

echo "This is $(date +%Y) year"
echo "Next is $(($(date +%Y) + 1)) year"

# get remain week by system time this year, how many week gone
echo "This year have passed $(date +%j) days"
echo "This year have passed $(($(date +%j)/7)) weeks"
